266342887 has 2 divisors, whose sum is σ = 266342888. Its totient is φ = 266342886.

The previous prime is 266342863. The next prime is 266342899. The reversal of 266342887 is 788243662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 266342887 - 2¹⁹ = 265818599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266342987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133171443 + 133171444.

It is an arithmetic number, because the mean of its divisors is an integer number (133171444).

Almost surely, 2^266342887 is an apocalyptic number.

266342887 is a deficient number, since it is larger than the sum of its proper divisors (1).

266342887 is an equidigital number, since it uses as much as digits as its factorization.

266342887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 774144, while the sum is 46.

The square root of 266342887 is about 16320.0149203363. The cubic root of 266342887 is about 643.3989793739.

The spelling of 266342887 in words is "two hundred sixty-six million, three hundred forty-two thousand, eight hundred eighty-seven".